Mercurial > hg > nginx
annotate src/http/modules/ngx_http_auth_basic_module.c @ 4412:d620f497c50f
Copyright updated.
author | Maxim Konovalov <maxim@nginx.com> |
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date | Wed, 18 Jan 2012 15:07:43 +0000 |
parents | 9c057d5e1c27 |
children | 4251e72b8bb4 05beaa2d87b3 |
rev | line source |
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503 | 1 |
2 /* | |
3 * Copyright (C) Igor Sysoev | |
4412 | 4 * Copyright (C) Nginx, Inc. |
503 | 5 */ |
6 | |
7 | |
8 #include <ngx_config.h> | |
9 #include <ngx_core.h> | |
10 #include <ngx_http.h> | |
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11 #include <ngx_crypt.h> |
503 | 12 |
13 | |
14 #define NGX_HTTP_AUTH_BUF_SIZE 2048 | |
15 | |
16 | |
17 typedef struct { | |
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18 ngx_str_t passwd; |
503 | 19 } ngx_http_auth_basic_ctx_t; |
20 | |
21 | |
22 typedef struct { | |
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23 ngx_str_t realm; |
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24 ngx_http_complex_value_t user_file; |
503 | 25 } ngx_http_auth_basic_loc_conf_t; |
26 | |
27 | |
28 static ngx_int_t ngx_http_auth_basic_handler(ngx_http_request_t *r); | |
29 static ngx_int_t ngx_http_auth_basic_crypt_handler(ngx_http_request_t *r, | |
30 ngx_http_auth_basic_ctx_t *ctx, ngx_str_t *passwd, ngx_str_t *realm); | |
31 static ngx_int_t ngx_http_auth_basic_set_realm(ngx_http_request_t *r, | |
32 ngx_str_t *realm); | |
33 static void ngx_http_auth_basic_close(ngx_file_t *file); | |
34 static void *ngx_http_auth_basic_create_loc_conf(ngx_conf_t *cf); | |
35 static char *ngx_http_auth_basic_merge_loc_conf(ngx_conf_t *cf, | |
36 void *parent, void *child); | |
681 | 37 static ngx_int_t ngx_http_auth_basic_init(ngx_conf_t *cf); |
503 | 38 static char *ngx_http_auth_basic(ngx_conf_t *cf, void *post, void *data); |
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39 static char *ngx_http_auth_basic_user_file(ngx_conf_t *cf, ngx_command_t *cmd, |
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40 void *conf); |
503 | 41 |
42 | |
43 static ngx_conf_post_handler_pt ngx_http_auth_basic_p = ngx_http_auth_basic; | |
44 | |
45 static ngx_command_t ngx_http_auth_basic_commands[] = { | |
46 | |
47 { ngx_string("auth_basic"), | |
631 | 48 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_HTTP_LMT_CONF |
49 |NGX_CONF_TAKE1, | |
503 | 50 ngx_conf_set_str_slot, |
51 NGX_HTTP_LOC_CONF_OFFSET, | |
52 offsetof(ngx_http_auth_basic_loc_conf_t, realm), | |
53 &ngx_http_auth_basic_p }, | |
54 | |
55 { ngx_string("auth_basic_user_file"), | |
631 | 56 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_HTTP_LMT_CONF |
57 |NGX_CONF_TAKE1, | |
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58 ngx_http_auth_basic_user_file, |
503 | 59 NGX_HTTP_LOC_CONF_OFFSET, |
60 offsetof(ngx_http_auth_basic_loc_conf_t, user_file), | |
61 NULL }, | |
62 | |
63 ngx_null_command | |
64 }; | |
65 | |
66 | |
667 | 67 static ngx_http_module_t ngx_http_auth_basic_module_ctx = { |
509 | 68 NULL, /* preconfiguration */ |
681 | 69 ngx_http_auth_basic_init, /* postconfiguration */ |
503 | 70 |
71 NULL, /* create main configuration */ | |
72 NULL, /* init main configuration */ | |
73 | |
74 NULL, /* create server configuration */ | |
75 NULL, /* merge server configuration */ | |
76 | |
77 ngx_http_auth_basic_create_loc_conf, /* create location configuration */ | |
78 ngx_http_auth_basic_merge_loc_conf /* merge location configuration */ | |
79 }; | |
80 | |
81 | |
82 ngx_module_t ngx_http_auth_basic_module = { | |
509 | 83 NGX_MODULE_V1, |
503 | 84 &ngx_http_auth_basic_module_ctx, /* module context */ |
85 ngx_http_auth_basic_commands, /* module directives */ | |
86 NGX_HTTP_MODULE, /* module type */ | |
541 | 87 NULL, /* init master */ |
681 | 88 NULL, /* init module */ |
541 | 89 NULL, /* init process */ |
90 NULL, /* init thread */ | |
91 NULL, /* exit thread */ | |
92 NULL, /* exit process */ | |
93 NULL, /* exit master */ | |
94 NGX_MODULE_V1_PADDING | |
503 | 95 }; |
96 | |
97 | |
98 static ngx_int_t | |
99 ngx_http_auth_basic_handler(ngx_http_request_t *r) | |
100 { | |
101 off_t offset; | |
102 ssize_t n; | |
103 ngx_fd_t fd; | |
539 | 104 ngx_int_t rc; |
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105 ngx_err_t err; |
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106 ngx_str_t pwd, user_file; |
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107 ngx_uint_t i, level, login, left, passwd; |
503 | 108 ngx_file_t file; |
109 ngx_http_auth_basic_ctx_t *ctx; | |
110 ngx_http_auth_basic_loc_conf_t *alcf; | |
111 u_char buf[NGX_HTTP_AUTH_BUF_SIZE]; | |
112 enum { | |
113 sw_login, | |
114 sw_passwd, | |
115 sw_skip | |
116 } state; | |
117 | |
118 alcf = ngx_http_get_module_loc_conf(r, ngx_http_auth_basic_module); | |
119 | |
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120 if (alcf->realm.len == 0 || alcf->user_file.value.len == 0) { |
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121 return NGX_DECLINED; |
503 | 122 } |
123 | |
124 ctx = ngx_http_get_module_ctx(r, ngx_http_auth_basic_module); | |
125 | |
126 if (ctx) { | |
127 return ngx_http_auth_basic_crypt_handler(r, ctx, &ctx->passwd, | |
128 &alcf->realm); | |
129 } | |
130 | |
539 | 131 rc = ngx_http_auth_basic_user(r); |
503 | 132 |
539 | 133 if (rc == NGX_DECLINED) { |
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134 |
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135 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0, |
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136 "no user/password was provided for basic authentication"); |
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137 |
503 | 138 return ngx_http_auth_basic_set_realm(r, &alcf->realm); |
139 } | |
140 | |
539 | 141 if (rc == NGX_ERROR) { |
503 | 142 return NGX_HTTP_INTERNAL_SERVER_ERROR; |
143 } | |
144 | |
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145 if (ngx_http_complex_value(r, &alcf->user_file, &user_file) != NGX_OK) { |
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146 return NGX_ERROR; |
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147 } |
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148 |
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149 fd = ngx_open_file(user_file.data, NGX_FILE_RDONLY, NGX_FILE_OPEN, 0); |
503 | 150 |
151 if (fd == NGX_INVALID_FILE) { | |
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152 err = ngx_errno; |
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153 |
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154 if (err == NGX_ENOENT) { |
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155 level = NGX_LOG_ERR; |
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156 rc = NGX_HTTP_FORBIDDEN; |
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157 |
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158 } else { |
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159 level = NGX_LOG_CRIT; |
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160 rc = NGX_HTTP_INTERNAL_SERVER_ERROR; |
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161 } |
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162 |
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163 ngx_log_error(level, r->connection->log, err, |
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164 ngx_open_file_n " \"%s\" failed", user_file.data); |
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165 |
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166 return rc; |
503 | 167 } |
168 | |
169 ngx_memzero(&file, sizeof(ngx_file_t)); | |
170 | |
171 file.fd = fd; | |
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172 file.name = user_file; |
503 | 173 file.log = r->connection->log; |
174 | |
175 state = sw_login; | |
176 passwd = 0; | |
177 login = 0; | |
178 left = 0; | |
179 offset = 0; | |
180 | |
181 for ( ;; ) { | |
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182 i = left; |
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183 |
503 | 184 n = ngx_read_file(&file, buf + left, NGX_HTTP_AUTH_BUF_SIZE - left, |
185 offset); | |
186 | |
187 if (n == NGX_ERROR) { | |
188 ngx_http_auth_basic_close(&file); | |
189 return NGX_HTTP_INTERNAL_SERVER_ERROR; | |
190 } | |
191 | |
192 if (n == 0) { | |
193 break; | |
194 } | |
195 | |
196 for (i = left; i < left + n; i++) { | |
197 switch (state) { | |
198 | |
199 case sw_login: | |
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200 if (login == 0) { |
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201 |
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202 if (buf[i] == '#' || buf[i] == CR) { |
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203 state = sw_skip; |
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204 break; |
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205 } |
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206 |
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207 if (buf[i] == LF) { |
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208 break; |
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209 } |
503 | 210 } |
211 | |
539 | 212 if (buf[i] != r->headers_in.user.data[login]) { |
503 | 213 state = sw_skip; |
214 break; | |
215 } | |
216 | |
539 | 217 if (login == r->headers_in.user.len) { |
503 | 218 state = sw_passwd; |
219 passwd = i + 1; | |
220 } | |
221 | |
222 login++; | |
223 | |
224 break; | |
225 | |
226 case sw_passwd: | |
227 if (buf[i] == LF || buf[i] == CR || buf[i] == ':') { | |
228 buf[i] = '\0'; | |
229 | |
230 ngx_http_auth_basic_close(&file); | |
231 | |
232 pwd.len = i - passwd; | |
233 pwd.data = &buf[passwd]; | |
234 | |
235 return ngx_http_auth_basic_crypt_handler(r, NULL, &pwd, | |
236 &alcf->realm); | |
237 } | |
238 | |
239 break; | |
240 | |
241 case sw_skip: | |
242 if (buf[i] == LF) { | |
243 state = sw_login; | |
244 login = 0; | |
245 } | |
246 | |
247 break; | |
248 } | |
249 } | |
250 | |
251 if (state == sw_passwd) { | |
252 left = left + n - passwd; | |
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253 ngx_memmove(buf, &buf[passwd], left); |
503 | 254 passwd = 0; |
255 | |
256 } else { | |
257 left = 0; | |
258 } | |
259 | |
260 offset += n; | |
261 } | |
262 | |
263 ngx_http_auth_basic_close(&file); | |
264 | |
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265 if (state == sw_passwd) { |
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266 pwd.len = i - passwd; |
2049 | 267 pwd.data = ngx_pnalloc(r->pool, pwd.len + 1); |
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268 if (pwd.data == NULL) { |
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269 return NGX_HTTP_INTERNAL_SERVER_ERROR; |
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270 } |
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271 |
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272 ngx_cpystrn(pwd.data, &buf[passwd], pwd.len + 1); |
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273 |
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274 return ngx_http_auth_basic_crypt_handler(r, NULL, &pwd, &alcf->realm); |
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275 } |
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276 |
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277 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0, |
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278 "user \"%V\" was not found in \"%V\"", |
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279 &r->headers_in.user, &user_file); |
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280 |
503 | 281 return ngx_http_auth_basic_set_realm(r, &alcf->realm); |
282 } | |
283 | |
284 | |
285 static ngx_int_t | |
286 ngx_http_auth_basic_crypt_handler(ngx_http_request_t *r, | |
287 ngx_http_auth_basic_ctx_t *ctx, ngx_str_t *passwd, ngx_str_t *realm) | |
288 { | |
289 ngx_int_t rc; | |
290 u_char *encrypted; | |
291 | |
292 rc = ngx_crypt(r->pool, r->headers_in.passwd.data, passwd->data, | |
293 &encrypted); | |
294 | |
295 ngx_log_debug3(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, | |
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296 "rc: %d user: \"%V\" salt: \"%s\"", |
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297 rc, &r->headers_in.user, passwd->data); |
503 | 298 |
299 if (rc == NGX_OK) { | |
300 if (ngx_strcmp(encrypted, passwd->data) == 0) { | |
301 return NGX_OK; | |
302 } | |
303 | |
304 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, | |
305 "encrypted: \"%s\"", encrypted); | |
306 | |
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307 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0, |
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308 "user \"%V\": password mismatch", |
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309 &r->headers_in.user); |
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310 |
503 | 311 return ngx_http_auth_basic_set_realm(r, realm); |
312 } | |
313 | |
314 if (rc == NGX_ERROR) { | |
315 return NGX_HTTP_INTERNAL_SERVER_ERROR; | |
316 } | |
317 | |
318 /* rc == NGX_AGAIN */ | |
319 | |
320 if (ctx == NULL) { | |
321 ctx = ngx_palloc(r->pool, sizeof(ngx_http_auth_basic_ctx_t)); | |
322 if (ctx == NULL) { | |
323 return NGX_HTTP_INTERNAL_SERVER_ERROR; | |
324 } | |
325 | |
326 ngx_http_set_ctx(r, ctx, ngx_http_auth_basic_module); | |
327 | |
328 ctx->passwd.len = passwd->len; | |
329 passwd->len++; | |
330 | |
331 ctx->passwd.data = ngx_pstrdup(r->pool, passwd); | |
332 if (ctx->passwd.data == NULL) { | |
333 return NGX_HTTP_INTERNAL_SERVER_ERROR; | |
334 } | |
335 | |
336 } | |
337 | |
338 /* TODO: add mutex event */ | |
339 | |
340 return rc; | |
341 } | |
342 | |
343 | |
344 static ngx_int_t | |
345 ngx_http_auth_basic_set_realm(ngx_http_request_t *r, ngx_str_t *realm) | |
346 { | |
347 r->headers_out.www_authenticate = ngx_list_push(&r->headers_out.headers); | |
348 if (r->headers_out.www_authenticate == NULL) { | |
349 return NGX_HTTP_INTERNAL_SERVER_ERROR; | |
350 } | |
351 | |
509 | 352 r->headers_out.www_authenticate->hash = 1; |
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353 ngx_str_set(&r->headers_out.www_authenticate->key, "WWW-Authenticate"); |
503 | 354 r->headers_out.www_authenticate->value = *realm; |
355 | |
356 return NGX_HTTP_UNAUTHORIZED; | |
357 } | |
358 | |
359 static void | |
360 ngx_http_auth_basic_close(ngx_file_t *file) | |
361 { | |
362 if (ngx_close_file(file->fd) == NGX_FILE_ERROR) { | |
363 ngx_log_error(NGX_LOG_ALERT, file->log, ngx_errno, | |
364 ngx_close_file_n " \"%s\" failed", file->name.data); | |
365 } | |
366 } | |
367 | |
368 | |
369 static void * | |
370 ngx_http_auth_basic_create_loc_conf(ngx_conf_t *cf) | |
371 { | |
372 ngx_http_auth_basic_loc_conf_t *conf; | |
373 | |
374 conf = ngx_pcalloc(cf->pool, sizeof(ngx_http_auth_basic_loc_conf_t)); | |
375 if (conf == NULL) { | |
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376 return NULL; |
503 | 377 } |
378 | |
379 return conf; | |
380 } | |
381 | |
382 | |
383 static char * | |
384 ngx_http_auth_basic_merge_loc_conf(ngx_conf_t *cf, void *parent, void *child) | |
385 { | |
386 ngx_http_auth_basic_loc_conf_t *prev = parent; | |
387 ngx_http_auth_basic_loc_conf_t *conf = child; | |
388 | |
581 | 389 if (conf->realm.data == NULL) { |
503 | 390 conf->realm = prev->realm; |
391 } | |
392 | |
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393 if (conf->user_file.value.len == 0) { |
503 | 394 conf->user_file = prev->user_file; |
395 } | |
396 | |
397 return NGX_CONF_OK; | |
398 } | |
399 | |
400 | |
401 static ngx_int_t | |
681 | 402 ngx_http_auth_basic_init(ngx_conf_t *cf) |
503 | 403 { |
404 ngx_http_handler_pt *h; | |
405 ngx_http_core_main_conf_t *cmcf; | |
406 | |
681 | 407 cmcf = ngx_http_conf_get_module_main_conf(cf, ngx_http_core_module); |
503 | 408 |
409 h = ngx_array_push(&cmcf->phases[NGX_HTTP_ACCESS_PHASE].handlers); | |
410 if (h == NULL) { | |
411 return NGX_ERROR; | |
412 } | |
413 | |
414 *h = ngx_http_auth_basic_handler; | |
415 | |
416 return NGX_OK; | |
417 } | |
418 | |
419 | |
420 static char * | |
421 ngx_http_auth_basic(ngx_conf_t *cf, void *post, void *data) | |
422 { | |
423 ngx_str_t *realm = data; | |
424 | |
581 | 425 size_t len; |
426 u_char *basic, *p; | |
427 | |
503 | 428 if (ngx_strcmp(realm->data, "off") == 0) { |
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429 ngx_str_set(realm, ""); |
583 | 430 return NGX_CONF_OK; |
503 | 431 } |
432 | |
581 | 433 len = sizeof("Basic realm=\"") - 1 + realm->len + 1; |
434 | |
2049 | 435 basic = ngx_pnalloc(cf->pool, len); |
581 | 436 if (basic == NULL) { |
437 return NGX_CONF_ERROR; | |
438 } | |
439 | |
440 p = ngx_cpymem(basic, "Basic realm=\"", sizeof("Basic realm=\"") - 1); | |
441 p = ngx_cpymem(p, realm->data, realm->len); | |
442 *p = '"'; | |
443 | |
444 realm->len = len; | |
445 realm->data = basic; | |
446 | |
503 | 447 return NGX_CONF_OK; |
448 } | |
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449 |
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450 |
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451 static char * |
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452 ngx_http_auth_basic_user_file(ngx_conf_t *cf, ngx_command_t *cmd, void *conf) |
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453 { |
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454 ngx_http_auth_basic_loc_conf_t *alcf = conf; |
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455 |
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456 ngx_str_t *value; |
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457 ngx_http_compile_complex_value_t ccv; |
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458 |
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459 if (alcf->user_file.value.len) { |
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460 return "is duplicate"; |
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461 } |
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462 |
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463 value = cf->args->elts; |
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464 |
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465 ngx_memzero(&ccv, sizeof(ngx_http_compile_complex_value_t)); |
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466 |
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467 ccv.cf = cf; |
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468 ccv.value = &value[1]; |
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469 ccv.complex_value = &alcf->user_file; |
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470 ccv.zero = 1; |
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471 ccv.conf_prefix = 1; |
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472 |
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473 if (ngx_http_compile_complex_value(&ccv) != NGX_OK) { |
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474 return NGX_CONF_ERROR; |
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475 } |
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476 |
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477 return NGX_CONF_OK; |
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478 } |